test: disable librt shmtest on non-MMU systems

[uclinux-h8/uClibc.git] / libm / e_cosh.c

diff --git a/libm/e_cosh.c b/libm/e_cosh.c
index 3f9ed63..6923b93 100644 (file)
--- a/libm/e_cosh.c
+++ b/libm/e_cosh.c
@@ -1,32 +1,27 @@
-/* @(#)e_cosh.c 5.1 93/09/24 */
 /*
  * ====================================================
  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  *
  * Developed at SunPro, a Sun Microsystems, Inc. business.
  * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice 
+ * software is freely granted, provided that this notice
  * is preserved.
  * ====================================================
  */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: e_cosh.c,v 1.7 1995/05/10 20:44:58 jtc Exp $";
-#endif
-
 /* __ieee754_cosh(x)
- * Method : 
+ * Method :
  * mathematically cosh(x) if defined to be (exp(x)+exp(-x))/2
- *     1. Replace x by |x| (cosh(x) = cosh(-x)). 
- *     2. 
- *                                                     [ exp(x) - 1 ]^2 
+ *     1. Replace x by |x| (cosh(x) = cosh(-x)).
+ *     2.
+ *                                                     [ exp(x) - 1 ]^2
  *         0        <= x <= ln2/2  :  cosh(x) := 1 + -------------------
  *                                                        2*exp(x)
  *
  *                                               exp(x) +  1/exp(x)
  *         ln2/2    <= x <= 22     :  cosh(x) := -------------------
  *                                                       2
- *         22       <= x <= lnovft :  cosh(x) := exp(x)/2 
+ *         22       <= x <= lnovft :  cosh(x) := exp(x)/2
  *         lnovft   <= x <= ln2ovft:  cosh(x) := exp(x/2)/2 * exp(x/2)
  *         ln2ovft  <  x           :  cosh(x) := huge*huge (overflow)
  *
@@ -38,19 +33,10 @@ static char rcsid[] = "$NetBSD: e_cosh.c,v 1.7 1995/05/10 20:44:58 jtc Exp $";
 #include "math.h"
 #include "math_private.h"
 
-#ifdef __STDC__
 static const double one = 1.0, half=0.5, huge = 1.0e300;
-#else
-static double one = 1.0, half=0.5, huge = 1.0e300;
-#endif
 
-#ifdef __STDC__
-       double __ieee754_cosh(double x)
-#else
-       double __ieee754_cosh(x)
-       double x;
-#endif
-{      
+double __ieee754_cosh(double x)
+{
        double t,w;
        int32_t ix;
        u_int32_t lx;
@@ -60,7 +46,7 @@ static double one = 1.0, half=0.5, huge = 1.0e300;
        ix &= 0x7fffffff;
 
     /* x is INF or NaN */
-       if(ix>=0x7ff00000) return x*x;  
+       if(ix>=0x7ff00000) return x*x;
 
     /* |x| in [0,0.5*ln2], return 1+expm1(|x|)^2/(2*exp(|x|)) */
        if(ix<0x3fd62e43) {
@@ -81,8 +67,8 @@ static double one = 1.0, half=0.5, huge = 1.0e300;
 
     /* |x| in [log(maxdouble), overflowthresold] */
        GET_LOW_WORD(lx,x);
-       if (ix<0x408633CE || 
-             (ix==0x408633ce)&&(lx<=(u_int32_t)0x8fb9f87d)) {
+       if (ix<0x408633CE ||
+             ((ix==0x408633ce)&&(lx<=(u_int32_t)0x8fb9f87d))) {
            w = __ieee754_exp(half*fabs(x));
            t = half*w;
            return t*w;
@@ -91,3 +77,21 @@ static double one = 1.0, half=0.5, huge = 1.0e300;
     /* |x| > overflowthresold, cosh(x) overflow */
        return huge*huge;
 }
+
+/*
+ * wrapper cosh(x)
+ */
+#ifndef _IEEE_LIBM
+double cosh(double x)
+{
+       double z = __ieee754_cosh(x);
+       if (_LIB_VERSION == _IEEE_ || isnan(x))
+               return z;
+       if (fabs(x) > 7.10475860073943863426e+02)
+               return __kernel_standard(x, x, 5); /* cosh overflow */
+       return z;
+}
+#else
+strong_alias(__ieee754_cosh, cosh)
+#endif
+libm_hidden_def(cosh)